OEM Toyota Echo Thermostat

Toyota Echo Thermostat Parts Questions & Experts Answers

• Thermostat
  90916-03093
  Q: How to service the thermostat on Toyota Echo?

  A: Service of the thermostat begins with removing the engine coolant through drainage. Service owners should begin by disconnecting the wire harness clamp from the water inlet then use a wrench to remove the 2 nuts which disconnect the water inlet from the cylinder block before ultimately removing the thermostat with its gasket. Reviews must establish the correct operating temperature of the thermostat by immersing it in water and heating it slowly while monitoring the valve opening from 80 - 84 degrees Celsius (176 - 183 degrees Fahrenheit). A thermostat requiring replacement should display these criteria. Check the thermostat valve lift when the temperature reaches 93 degrees Celsius (199 degrees Fahrenheit) because the lift should be between 8.5 and 10.345 inches otherwise replace it. Within cold conditions below 40 degrees Celsius (104 degrees Fahrenheit), check the valve closure status; non-closed valves require immediate thermostat replacement. You must install the new gasket on the thermostat before installing it facing upward from the prescribed position while keeping the jiggle valve within a 10 degrees window. After installing the water inlet with its 2 nuts you must reconnect the wire harness to the water inlet and torque it to 9.0 Nm (90 kgf-cm, 80 inch lbs.). To complete the process you should add engine coolant while testing for leaks during engine operation.